28 Feb
2005
28 Feb
'05
12:24 p.m.
Part 2 of 2
==ser.cfg===================================================================
========================================
#
# $Id: serconf.sh,v 1.3 2003/11/03 13:03:58 janakj Exp $
#
# autogenerated SER configuration
#
# user: uid=0(root) gid=0(root)
groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
# system: Linux baltodb.popdial.com 2.6.10-1.760_FC3 #1 Wed Feb 2 00:14:23
EST 2005 i686 i686 i386 GNU/Linux
# date: Sat Feb 26 02:57:50 EST 2005
#
# ----------- global configuration parameters ------------------------
/*
debug=4
fork=yes
port=5060
log_stderror=no
memlog=5
*/
mhomed=yes
fifo="/tmp/ser_fifo"
alias=baltodb.popdial.com
# uncomment to override config values for test
# /*
debug=4 # debug level (cmd line: -ddd)
fork=yes
port=5060
log_stderror=yes # (cmd line: -E)
fifo="/tmp/ser_fifox"
# */
check_via=no # (cmd. line: -v)
dns=no # (cmd. line: -r)
rev_dns=no # (cmd. line: -R)
children=16
# if changing fifo mode to a more restrictive value, put
# decimal value in there, e.g. dec(rw|rw|rw)=dec(666)=438
#fifo_mode=438
# ------------------ module loading ----------------------------------
loadmodule "/usr/local/lib/ser/modules/tm.so"
loadmodule "/usr/local/lib/ser/modules/sl.so"
loadmodule "/usr/local/lib/ser/modules/acc.so"
loadmodule "/usr/local/lib/ser/modules/rr.so"
loadmodule "/usr/local/lib/ser/modules/maxfwd.so"
loadmodule "/usr/local/lib/ser/modules/mysql.so"
loadmodule "/usr/local/lib/ser/modules/usrloc.so"
loadmodule "/usr/local/lib/ser/modules/registrar.so"
loadmodule "/usr/local/lib/ser/modules/auth.so"
loadmodule "/usr/local/lib/ser/modules/auth_db.so"
loadmodule "/usr/local/lib/ser/modules/textops.so"
loadmodule "/usr/local/lib/ser/modules/uri.so"
loadmodule "/usr/local/lib/ser/modules/group.so"
loadmodule "/usr/local/lib/ser/modules/msilo.so"
loadmodule "/usr/local/lib/ser/modules/enum.so"
loadmodule "/usr/local/lib/ser/modules/uri_db.so"
# ----------------- setting module-specific parameters ---------------
# all DB urls here
#modparam("usrloc|acc|auth_db|group|msilo|uri",
"db_url","mysql://ser:heslo@localhost/ser")
modparam("usrloc|acc|auth_db|group|msilo|uri_db",
"db_url","mysql://ser:heslo@localhost/ser")
# -- usrloc params --
/* 0 -- dont use mysql, 1 -- write_through, 2--write_back */
modparam("usrloc", "db_mode", 2)
modparam("usrloc", "timer_interval", 10)
# -- auth params --
modparam("auth_db", "calculate_ha1", yes)
#modparam("auth_db", "user_column", "user_id")
modparam("auth_db", "password_column", "password")
modparam("auth", "nonce_expire", 300)
# -- rr params --
# add value to ;lr param to make some broken UAs happy
modparam("rr", "enable_full_lr", 1)
# -- acc params --
# that is the flag for which we will account -- don't forget to
modparam("acc", "db_flag", 1 )
modparam("acc", "db_missed_flag", 3 )
# -- tm params --
modparam("tm", "fr_timer", 20 )
modparam("tm", "fr_inv_timer", 90 )
modparam("tm", "wt_timer", 20 )
# -- msilo params
modparam("msilo", "registrar",
"sip:registrar@baltodb.popdial.com")
# -- enum params --
#
modparam("enum", "domain_suffix", "e164.arpa.")
# ------------------------- request routing logic -------------------
# main routing logic
route{
/* ********* ROUTINE CHECKS **********************************
*/
# filter too old messages
if (!mf_process_maxfwd_header("10")) {
log("LOG: Too many hops\n");
sl_send_reply("483","Alas Too Many Hops");
break;
};
#if (len_gt( max_len )) {
if ( msg:len > max_len ) {
sl_send_reply("513", "Message too large
sorry");
break;
};
# Make sure that requests dont advertise addresses
# from private IP space (RFC1918) in Contact HF
# (note: does not match with folded lines)
if (search("^(Contact|m): .*(a)(192\.168\.|10\.|172\.16)")) {
# allow RR-ed requests, as these may indicate that
# a NAT-enabled proxy takes care of it; unless it is
# a REGISTER
if ((method=="REGISTER" || !
search("^Record-Route:"))
&& !(
src_ip==192.168.0.0/16 ||
src_ip==10.0.0.0/8 || src_ip==172.16.0.0/12 )) {
log("LOG: Someone trying to register
from private IP again\n");
sl_send_reply("479", "We dont accept
private IP contacts" );
break;
};
};
# anti-spam -- if somene claims to belong to our domain in From,
# challenge him (skip REGISTERs -- we will chalenge them later)
if
(search("(From|F):.*(baltodb\.popdial\.com|66\.159\.88\.19)")) {
# invites forwarded to other domains, like FWD may
cause subsequent
# request to come from there but have iptel in From
-> verify
# only INVITEs (ignore FIFO/UAC's requests, i.e.
src_ip==myself)
if (method=="INVITE" & !(src_ip==69.19.88.19)) {
if (!(proxy_authorize(
"baltodb.popdial.com" /* realm */,
"subscriber" /*
table name */ ))) {
proxy_challenge("baltodb.popdial.com" /* realm */, "0" /* no-qop
*/);
break;
};
# to maintain outside credibility of our
proxy, we enforce
# username in From to equal digest
username; user with
# "john.doe" id could advertise
"bill.gates" in From otherwise;
if (!check_from()) {
log("LOG: From Cheating
attempt in INVITE\n");
sl_send_reply("403",
"That
is ugly -- use From=id next time (OB)");
break;
};
# we better don't consume credentials --
some requests may be
# spiraled through our server
(sfo@iptel->7141@iptel) and the
# subsequent iteration may challenge
too, for example because of
# iptel claim in From; UACs then give up
because they
# already submitted credentials for the given realm
#consume_credentials();
}; # INVITEs claiming to come from our domain
} else if (method=="INVITE" &&
!(uri=~"[@:\.](baltodb\.popdial\.com|66\.159\.88\.19)([;:].*)*"
# ... and we serve our gateway too if
present
| uri=~"@66\.159\.88\.16([;:].*)*" )) {
#the INVITE neither claims to come from our domain
nor is it targeted to it
# -> junk it
sl_send_reply("403", "No relaying");
break;
};
/* ********* RR ********************************** */
# to be safe, record route everything; UAs may use different
# transport protocols and need to have SER in path
record_route();
# if route forces us to forward to some explicit destination,
# do so; check however first that a cheater didn't preload
# a gateway destination to bypass PSTN ACLs
if (loose_route()) {
if
(uri=~"sip:[+0-9]+@66\.159\.88\.16") {
# it is gateway -- proceed to ACLs
route(3);
break;
};
# route HF determined next hop; forward there
append_hf("P-hint: rr-enforced\r\n");
t_relay();
break;
};
/* ********* check for requests targeted out of our domain...
******* */
# sign of our domain: there is '@' (username) or : (nothing) in
# front of our domain name ; ('.' is not there -- we
handle all
# xxx.iptel.org as outbound hosts);if none of these cases
matches,
# proceed with processing of outbound requests in route[2]
if
(!(uri=~"[@:](sip[\.)?(baltodb\.popdial\.com|66\.159\.88\.19)([;:].*)*" |
uri=~"@66\.159\.88\.16([;:].*)*")) {
route(2);
break;
};
/* ************ requests for our domain ********** */
/* now, the request is for sure for our domain */
# registers always MUST be authenticated to
# avoid stealing incoming calls
if (method=="REGISTER") {
# Make sure that user's dont register infinite loops
# (note: does not match with folded lines)
if (search("^(Contact|m):
.*(a)(baltodb\.popdial\.com|66\.159\.88\.19)")) {
log(1, "LOG: alert: someone trying to
set aor==contact\n");
sl_send_reply("476", "No Server
Address
in Contacts Allowed" );
break;
};
if (search("^(Contact|m):
.*66\.159\.88\.16")) {
log(1, "LOG: alert: protected
contacts\n");
sl_send_reply("476", "No Server
Address
in Contacts Allowed" );
break;
};
if (!www_authorize( "baltodb.popdial.com" /*
realm */,
"subscriber" /* table name
*/ )) {
# challenge if none or invalid
credentials
www_challenge( "baltodb.popdial.com" /*
realm */,
"0" /* no qop -- some phones can't deal with it */);
break;
};
# prohibit attempts to grab someone else's To
address
# using valid credentials;
if (!check_to()) {
log("LOG: To Cheating attempt\n");
sl_send_reply("403", "That is ugly --
use To=id in REGISTERs");
break;
};
# it is an authenticated request, update Contact
database now
if (!save("location")) {
sl_reply_error();
};
m_dump();
break;
};
# some UACs might be fooled by Contacts our UACs generate to
make MSN
# happy (web-im, e.g.) -- tell its urneachable
if (uri=~"sip:daemon@" ) {
sl_send_reply("410", "daemon is gone");
break;
};
# is this an ENUM destination (leading +?)? give it a try, if
the lookup
# doesn't change URI, just continue
if (uri=~"sip:\+[0-9]+@") {
if (!enum_query("voice")) { # if parameter empty, it
defaults to "e2u+sip"
enum_query(""); # E2U+sip
};
} else {
# aliases (take precedences over PSTN number;
provisioning interface
# is set up to assinge aliases beginning with 8)
lookup("aliases");
};
# check again, if it is still for our domain after aliases are
resolved
if
(!(uri=~"[@:](sip[\.)?(baltodb\.popdial\.com|66\.159\.88\.19)([;:].*)*" |
uri=~"@66\.159\.88\.16([;:].*)*")) {
route(5);
break;
};
# now check if it's about PSTN destinations through
our gateway;
# note that 8.... is exempted for numerical non-gw destinations
if (uri=~"sip:\+?[0-79][0-9]*@.*") {
route(3);
break;
};
# native SIP destinations are handled using our USRLOC DB
if (!lookup("location")) {
# handle user which was not found ...
route(4);
break;
};
# check whether some inventive user has uploaded gateway
# contacts to UsrLoc to bypass our authorization logic
if (uri=~"sip:[+0-9]+@66\.159\.88\.16")
{
# it is gateway -- proceed to ACLs
route(3);
break;
};
/* ... and also report on missed calls ... */
setflag(3);
# we now know we may, we know where, let it go out now!
append_hf("P-hint: USRLOC\r\n");
if (!t_relay()) {
sl_reply_error();
break;
};
}
#------------------- OUTBOUND ----------------------------------------
# routing logic for outbound requests targeted out of our domain
# (keep in mind messages to our users can end up here too: for example,
# an INVITE may be UsrLoc-ed, then the other party uses outbound
# proxy with r-uri=the usr_loced addredd (typically IP))
route[2] {
append_hf("P-hint: OUTBOUND\r\n");
t_relay();
}
#------- ALIASED OUTBOUND --------------------------------------------
# routing logic for inbound requests aliased outbound; unlike
# with real outbound requests we do not force authentication
# as these calls are server by our server and we do not want
# to disqualify unathenticated request originatiors from other
# domains
route[5] {
append_hf("P-hint: ALIASED-OUTBOUND\r\n");
t_relay();
}
#----------------- PSTN ----------------------------------------------
# logic for calls to the PSTN
route[3] {
# turn accounting on
setflag(1);
/* require all who call PSTN to be members of the "int" group;
apply ACLs only to INVITEs -- we don't need to protect other
requests, as they
don't imply charges; also it could cause troubles when a call
comes in via PSTN
and goes to a party that can't authenticate (voicemail, other
domain) -- BYEs would
fail then; exempt Cisco gateway from authentication by IP
address -- it does not
support digest
*/
if (method=="INVITE" && (!src_ip==69.19.88.16)) {
if (!proxy_authorize( "baltodb.popdial.com"
/* realm */,
"subscriber" /* table name */)) {
proxy_challenge( "baltodb.popdial.com"
/* realm */, "0" /* no qop */ );
break;
};
# let's check from=id ... avoids accounting
confusion
if (method=="INVITE" & !check_from()) {
log("LOG: From Cheating attempt\n");
sl_send_reply("403", "That is ugly --
use From=id next time (gw)");
break;
};
if(!is_user_in("credentials", "int")) {
sl_send_reply("403", "NO PSTN
Privileges...");
break;
};
consume_credentials();
}; # INVITE to authorized PSTN
# if you have passed through all the checks, let your call go to
GW!
rewritehostport("69.19.88.16:5060");
# snom conditioner
if (method=="INVITE" && search("User-Agent:
snom")) {
replace("100rel, ", "");
};
append_hf("P-hint: GATEWAY\r\n");
# use UDP to guarantee well-known sender port (TCP ephemeral)
t_relay_to_udp("69.19.88.16","5060");
}
/* *********** handling of unavailable user ******************* */
route[4] {
/**/
# message store
if (method=="MESSAGE") {
t_newtran();
if (m_store("0")) {
t_reply("202", "Accepted for Later
Delivery");
} else {
t_reply("503", "Service
Unavailable");
};
break;
};
/**/
# non-Voip -- just send "off-line"
if (!(method=="INVITE" || method=="ACK" ||
method=="CANCEL")) {
sl_send_reply("404", "Not Found");
break;
};
# voicemail subscribers ...
t_newtran();
t_reply("404", "Not Found");
# we account missed incoming calls; previous statteful
processing
# guarantees that retransmissions are not accounted
if (method=="INVITE") {
acc_db_request("404 missed call",
"missed_calls");
};
}